Dad bought this a whole ago and has used it quite a few times,he has macular degeneration and can't see to use it now and has asked me to sell it for him
It comes with two tubes of gel
I have had to download the instruction booklet  from the website....it was in the box (which isn't perfect) when dad gave it to me but they weren't there when I came to take the photos ...if I find it obviously I will include them. 
Key functions
Hot and cold therapy combined with infrared therapy
Portable and lightweight
Fully re-chargeable
Auto shut off
3 treatment settings
Easy grip
One of the rubber stoppers from underneath charger unit seems to be missing but it does detract from anything.